Have you ever noticed those horrible scratches that seem to mysteriously appear on your CDs and DVDs, even though you take the necessary precautions to prevent them? Those scratches are called "particle abrasions" and are caused by tiny particles of dust and dirt that accumulate on your drive trays. Over time these particles can cut deep scratches into the surfaces of compact disks and turn your precious CDs and DVDs into light reflecting table coasters. Tea anyone?